package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.mapper.ShoppingCartMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    @Override
    @Transactional
    public void submit(Orders orders) {

        Long userId = BaseContext.getCurrentId();//上下文获得已登录用户id

        LambdaQueryWrapper<ShoppingCart>lqw=new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> list = shoppingCartService.list(lqw);//根据用户id获得购物车

        if(list==null||list.size()==0)
        {
            throw new CustomException("购物车为空，不能下单");
        }

        //查询用户信息
        User user = userService.getById(userId);//根据用户id获得用户所有信息

        //查询地址
        Long addressBookId = orders.getAddressBookId();//前端发送的异步请求参数包含地址id
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook==null)
        {
            throw new CustomException("地址信息不正确，不能下单");
        }

        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount=new AtomicInteger(0);//总金额


        //表单明细    遍历购物车
        List<OrderDetail> orderDetails = list.stream().map((item)->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());//总金额累加
            return orderDetail;

        }).collect(Collectors.toList());


//表单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);//待发货
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        //表单明细
        orderDetailService.saveBatch(orderDetails);
        //表单
        this.save(orders);

        //清空购物车
        shoppingCartService.remove(lqw);


    }
   /*@Transactional
   public void submit(Orders orders) {
       //获得当前用户id
       Long userId = BaseContext.getCurrentId();

       //查询当前用户的购物车数据
       LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
       wrapper.eq(ShoppingCart::getUserId,userId);
       List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);

       if(shoppingCarts == null || shoppingCarts.size() == 0){
           throw new CustomException("购物车为空，不能下单");
       }

       //查询用户数据
       User user = userService.getById(userId);

       //查询地址数据
       Long addressBookId = orders.getAddressBookId();
       AddressBook addressBook = addressBookService.getById(addressBookId);
       if(addressBook == null){
           throw new CustomException("用户地址信息有误，不能下单");
       }

       long orderId = IdWorker.getId();//订单号

       AtomicInteger amount = new AtomicInteger(0);

       //组装订单明细信息
       List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
           OrderDetail orderDetail = new OrderDetail();
           orderDetail.setOrderId(orderId);
           orderDetail.setNumber(item.getNumber());
           orderDetail.setDishFlavor(item.getDishFlavor());
           orderDetail.setDishId(item.getDishId());
           orderDetail.setSetmealId(item.getSetmealId());
           orderDetail.setName(item.getName());
           orderDetail.setImage(item.getImage());
           orderDetail.setAmount(item.getAmount());
           amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
           return orderDetail;
       }).collect(Collectors.toList());

       //组装订单数据
       orders.setId(orderId);
       orders.setOrderTime(LocalDateTime.now());
       orders.setCheckoutTime(LocalDateTime.now());
       orders.setStatus(2);
       orders.setAmount(new BigDecimal(amount.get()));//总金额
       orders.setUserId(userId);
       orders.setNumber(String.valueOf(orderId));
       orders.setUserName(user.getName());
       orders.setConsignee(addressBook.getConsignee());
       orders.setPhone(addressBook.getPhone());
       orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
               + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
               + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
               + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
       //向订单表插入数据，一条数据
       this.save(orders);

       //向订单明细表插入数据，多条数据
       orderDetailService.saveBatch(orderDetails);

       //清空购物车数据
       shoppingCartService.remove(wrapper);
   }*/
}
